package com.servlet;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import com.dao.NewsDao;
import com.dao.UserDao;
import com.daoimpl.NewsDaoImpl;
import com.daoimpl.UserDaoImpl;
import com.vo.News;
import com.vo.User;

/**
 * Servlet implementation class FindUserServlet
 */
@WebServlet("/DeleteNewsByIdServlet")
public class DeleteNewsByIdServlet extends HttpServlet {
	private static final long serialVersionUID = 1L;
       
    /**
     * @see HttpServlet#HttpServlet()
     */
    public DeleteNewsByIdServlet() {
        super();
        // TODO Auto-generated constructor stub
    }

	/**
	 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
		request.setCharacterEncoding("UTF-8");
		response.setHeader("content-type", "text/html; charset=UTF-8");
		
		int id = Integer.parseInt(request.getParameter("id"));
		NewsDao dao = new NewsDaoImpl();

		HttpSession session = request.getSession();
		//session对象
		List<News> list = (List<News>)session.getAttribute("newsList");
		News newsinfo = dao.findNewsById(id);
		if(dao.deleteNewsById(id)) {
			//更新用户List
			list.remove(newsinfo);
			session.setAttribute("newsList", list);
			response.getWriter().print("删除成功！");
		}else {
			response.getWriter().print("删除失败！");
		}
		response.setHeader("refresh","0.5; URL=viewnews.jsp");
	}

	/**
	 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
		doGet(request, response);
	}
}
